Augustus gross



(No Model.)

A. GROSS. APPLIANGE FOR LOOKING NUTS ON BOLTS. No. 461,678.' Patented Oct. 20, 1891.

UNITED STATES PATENT OFFICE.

AUGUSTUS GROSS, OF SYDNEY, NEXV SOUTH WALES.

APPLIANCE FOR LOOKING NUTS ON BOLTS.

SPECIFICATION formingpart of Letters Patent No. 461,678, dated October 20, 1891.

Application filed April 27, 1891. Serial No. 390,656. (No model.)

To all whom it may concern:

Be it known that I, AUGUSTUS GROSS, optician, of Sydney, in the Colony of New South \Vales, Australia, have invented an Improved Mode of and Appliance for Locking Nuts on Bolts, of which the following is a specification.

In carrying my invention into effect an ordinary bolt may be adapted to the appliance for looking a nut thereupon. This is done by making a longitudinal groove or keyway down the threaded part of the bolt. The groove or keyway should be of sufficient depthto allow the locking appliance or key itself to repose Within it without interferingin anyway vwith the passage of the nut over the threaded appliance may be readily understood reference will be made to the accompanying sheet of drawings, in which Figure 1 is an elevation showing the front. of the lock-nut appliance in position.

Fig. 2 is a plan view of the same, showing the nut locked. Fig.3 is a vertical section of the same, taken on the line 1 2 of Fig. 1, the looking appliance being shown in elevation and the nut locked. Fig. 4: is a cross-section of the device on the line 3 4 of Fig. 3, the looking appliance being removed. Fig. 5 are views that show in detail the locking applie ance or key separate from the bolt.

A is the bolt, and B is the threaded part thereof.

0 is the nut.

D is the locking appliance or locking-key, of which d is the enlarged or bulbous head hereinbefore referred to. A groove or keyway D (see Fig.4) is made longitudinally along the threaded part B of the bolt A, the groove extending beyond the threaded part B. The end of the groove is enlarged to receive the bulbous head of the locking appliance orkey D, and will prevent the key from being withthe bottom of the thread of the screw on the bolt. (See Fig. 3.) The key is also made to sit firmly in the keyway, so that the parts maybe readily fitted together for use; but the bulbous or round end is thickened so as to extend outward beyond the surface of the bolt and tapered so that as the boltis driven home in the bolt-hole the head of said key or look is wedged firmly into the seat or cavity, thus firmly fixing the key in place When the bolt is fixed in position and the nut screwed home, the'workman will turn over. in any suitable or handy Way the projecting portion of the key into the position shown in Figs. 2 and 8, thus firmly securing the nut.

Having now particularly described and askey or look willclear the bottom of the thread i of the bolt, having an enlarged bulbous end tapered so as to be wedged firmly to the bolt on the insertion of the latter in the bolt and extendingbeyond the nut a sufficient length to allow it to be turned over the nut, and thereby secure and retain the nut in position, as set fort-h.

Dated at Sydney, this 21st day of March, 1891.

AUGUSTUS GROSS.

In presence of WM. D. MASSEY, J. S. WHIT nooKE. 

